hard-startingrunning-12-018-93-2572-193

(- Service-InformationM otorcycle ©BMW of N.A. Service Department Group: l 2 Engine Electric January, 1993 1201893 {2572) ~or USA Only Engine Difficult to Start, Temporarily Runs On Only One Cylinder – All Boxer Engines Problem: Remedy: Control Unit Under certain conditions (low temperature, poorly tuned or synchronized engine}, initially only one of the engines’ cylinders fire. 1 l The ignition coils have been modified 1 2 13 1 243 910 – old coil 1 2 13 1 244 426 – new coil 2) The timing control in the ignition control unit has been modified so that no ignition sparks are suppressed even when the engine runs out of synchronization. Identification: The part number of the modified control unit is the same as previous units, however, it can be recognized by the turquoise lettering. Note: Models with The modified control units can be used on all boxer engines with electronic ignition {from 1981 on). However, control units with white or pink lettering should only be used with ignition coil 1 2 1 3 1 243 91 0 (all boxer engines before 1 991 ) , i.e., do not use the new coil with the white or pink control unit. The new control unit, however, can be used with the old coil. Kick Starters: The modified ignition control units (turquoise color} are only available with a switching off duration of 1.2 .sP.conds, i.e., to protect the ignition coils, the primary current is interrupted after 1.2 seconds if engine speed information is :-:’.)t received. Please initial and route to the following before filing Service Parts Sales Warranty Technicians This has no effect on starting with the electric starter motor. When kick starting, the engine should be turned over and the starting procedure completed within 1.2 seconds. Engine speed information can be simulated by switching the ignition off and on again with the key or by using the emergency “off” switch if the starting procedure cannot be completed within 1 .2 seconds. Very truly yours, BMW of North America, Inc. Frank Stevens National Service Manager Motorcycle Group FS:tb/432.9 Richard Dampf National Technical Manager (